The main Ancient Greek terms for riddle are αἴνιγμα (ainigma, plural αἰνίγματα ainigmata, deriving from αἰνίσσεσθαι 'to speak allusively or obscurely', itself from αἶνος 'apologue, fable')[1] and γρῖφος (grîphos, pl. γρῖφοι grîphoi). The two terms are often used interchangeably, though some ancient commentators tried to distinguish between them.[2]
Riddles appear to have been a popular component of ancient symposia, and have at various points in the history of the Greek-speaking world also been a significant literary form.